Double-zigzag sewing-machine.



No. 686,662. Patented Nav. l2, Ism'.

- H. A. KLEMM.

DOUBLE ZIGZAG SEWING MACHINE.

(Application med .rm 21, 1961.)

. Patented Nov. I2, |90I. H. A. KLEMM. Y DOUBLE ZIGZAG SEWING MACHINE.

(Applienyinn' and 1.11.91, 1901.)

(No Modal.)

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mvENToR v No. 686,662. Patenteduov. l2, |9'ol.

H. A. KLEMM.

DUUBLE ZIGZAG SEWING MACHINE.

, (Applieatin mea Jan. 21, 1901.) (No Model.) 4 Sheets-Sheet 3.

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HERMANN A. KLEMM, OE NEW YORK, N. AssIeNoR To AMELIA I-IEssEL, oF BOROUGH OE BRONX, NEW YORK, N. Y., AND SOPHIE HEssEL, OE- sHELDoN, CONNECTICUT.

..DOUBLEZIGZAG SEWING-MACHINE.

SPECIFICATION forming part ont'- Letters Patent N o. 686,662, datedNovember 12, 1901. Application tiled January 21, 1901. Serial No. 44,127. (No model.)

To all whom tmcty concern: A Y dle-bar in vertical section. Fig. Sis atrans- Be it known that I, HERMANN A.KLEMM, a verse section of the machine on line 3 3 of citizen of the'United States of America, and a Fig. 1. Fig. 4 is a front elevation with a secresidentof the' city of'pNew'York,borough of ytion of the bed-plate on line 4 4 of Fig. 1. 55 5 Bronx', county of Westchester, and State of Fig. 5 is a detail of the needle-bar of Fig. 2 New York, haveinvented certain new and use- Vand its supporting and operating mechanism ful Improvements in Double-Zigzag Sewingin front elevation. Fig. 6 is a plan View of Machines, of which the following is a speci- `the complete machine. Fig. '7 is a detail 1 cation. showing the two needle-bars in horizontal 6o 1o My invention consists of appliances to sewsection,v also a horizontal section ot' the supin g-machines for producing fiat fancy or ornaporting-frame of Fig. 5 Aand plan view of part mental and very elastic seams by the use of of the needle-bar-operating gear. Fig. 8 is a two needles each carryingits thread and detail showing the two needle-bars in horisuitable under thread mechanisms for chainzontal section and a. plan View of a laterally- 65 i 5 ing or locking the needle-threads, whereby projecting arm of one of the needle-bars on on the upper surface two parallel rows of which the needleis mounted instead of being stitches are formed at a suitable distance mounted directly on the bar. Fig. 9 isaplan apart, with diagonal or zigzag loops of each viewof the presser-foot, showing the needleextending from one to the other of the parholes and the slot for affording clearance for 7o 2o allel rows, so as to form a double-zigzag seam the needle-threads. Fig. lO is a detail of the in which the diagonal loops cross each other throat-plate, showing the'feed-slot, needleat the middle line between the two rows of holes, and clearance-slots for the needlestitches, the arrangement being such that eX- threads. Figs 1,1 to 17, inclusive, are perchange of the needles is eifected without spective views showing the seaml and illus- 75 turning the needles7 whereby the relations of trating the operations of the needles and the the needles of the looping device are unlooping-hook when the hook is adapted for changed and a single looper working in the bindingboth needle-threads. 1 plane of the two needles may bind off the The needle a' is mounted in the lower end loops of vboth needles', said seams being espeofthe needle-bar b in lthe usual manner; but 8o 3o cially useful in uniting elastic knit fabrics. the needle c is mounted nearthe vextremity In this example I represent a couple of neeofa laterally-projecting arm d of the needledles placed side by side in a line at right'anbar e, the plane in which the two needles gles to the feed-line, with means for causing stand being at right angles to the feed-line, them to exchange places with eachother at the direction ofV which is indicated by the 85 35 each operation for laying the diagonal loops presser-foot B in Figs. l and 4. (See Fig. 8 extending from one line of stitches tothe other for further illustration of the relations of the and so that they thus cross each other, and needles and their bars.) The needles change I have chosen a machine of common construcplaces with each other yafter rising clear of tion in respect to main parts' and have conthe work successively and before descending 9o 4o trived the appliances for my purposes as into the work again to cross the threads from suited to such a machine, but will modify one line of stitches to the other on the upper them in future constructions and for adaptasurface ofthe material and to cross the threads tion to other machines as may be required. intermediately of said lines, and thus form My invention is, as embodied in the presthe double-zigzag' stitch shown in Figs. 11 to 95 45 ent machine, represented in the accompany- 17, inclusive. This is the essential feature ing drawings, in Which.- of the invention and can be accomplished in Figure lis a side elevation with the bedvarious ways, one of which (shown herein for plate in section. Fig. 2 is a detail showing illustration) is contrived as follows; but I do one of the needle-bars and part of the crank not limit my claim to any particular way. roo

5o mechanism for operating it in elevation. It In Figs. 1 and 8 the needles stand in the also shows the supporting-frame for the neeposition for beginning their work. They are first. thrust down through the work for engagement of their threads by the looper. In this case it is a single looping-hook f, working in the plane of the two needles, or it may be a shuttle. Vhen after their threads are thus engaged the needles rise again above the work, the needle-bar b shifts downward relatively to the lower margin of the drawing (see Fig. S) far enough to clear the eX- tremity of arm CZ, which then moves leftward into the position vacated by bar b, and bar Z2 shifts to the right hand and upward as to the drawing into the position for substituting its needle for the needle c. Then the needles make another stroke through the work and retire, as before, and the needles shift back again into their original positions. Vith these outlines of the changing operations of the needles stated at the outset the contrivances of apparatus for effecting them, which will now be described, will be more easily understood.

The needle-bar Z) is mounted so as to reciprocate vertically in a frame rr, which is carried in another frame g, pivoted at ZL on the left hand of the front face of the machinehead t, so as to swing like a gate toward and from the face of said head and is also so arranged in said gate as to slide radially to the pivots of the gate. Said frame r has a lateral arm 7' projecting from the right-hand side, which is coupledby a connecting-rod Zt with a rocking arm Z, projecting upward from the pivot m and having a stud-pin o, working in the groove n of a cam-disk p for rocking armZ to swing the needle-bar b. The cam-disk p is geared by a pair of bevel-wheels q with the main shaft s.

As the needles shift only one way to each complete circle of the rest of the machine, the wheels q for operating the cam-disk p are proportioned for one revolution of it to two cycles of the rest of the machine.

For sliding the needle-bar-supporti ng frame r in the gate-frame g said frame r is coupled by a link t, pivoted to it at u, with a lever c, pivoted to the machine-head at w and geared by the stud zr with the cam-groove y in the disk z, carried on the shaft 2, which is geared by the wheel 3 and one of the bevel-wheels q on the main shaft s. This gives the lateral motions to needle-bar Z) for clearing arm CZ, and the gate-frame gives the motions for traversing the feed-line, the course ot' which motions combined is indicated by the dotted line 4, Fig. S. The needle-har e is also mounted in a swinging frame 5 for shifting needle c forward and backward from side to side of the seam, said frame being pivoted to the machine-head at 6 on the right-hand side, and it is coupled at its other side by the connecting-rod 7, pivoted to it at S, with another rocking arm 9 on the same pivot m that carries the rocking arm Z, but projecting down ward, while arm Z projects reversely, so that the needles are always shifted reversely to each other.

The motion for reciprocating the needles vertically is communicated from the main shaft s iirst to needle-bar b by the connecting-rod 10 on the crank-pin 11 and coupled with the stud-pin 12 of a collar 13, fixedly attached to the needle-bar, the stud-pin 12 being free to play in the eye of the connecting-rod as the needle-bar b shifts forward and backward in crossing from side to side of the seam. From this needle-bar b motion is communicated to the other bar e by means of the block 14, rigidly secured to bar b just above collar 13 and having the horizontal slot 15, in which a stud 16 of a collar 17, rigidly secured to bar e, is engaged, so that bar e is made to Work in unison with bar b. The slot 15 permits the lateral play of frame r relatively to said stud 16, and the length of the stud is adapted to maintain due connection of it with block 14, subject to the swinging motions of the bar-carrying frames r and 5; but any other means of transmitting the motion from one needle-bar to the other may be employed, or the needle-bars may be operated by independent levers, one for each, in the usual way.

The presser-foot B has two perforations 1S, through which the needles work, between which is an A-shaped slot l), through which the crossed needle threads run, and the stitches are drawn up when the work feeds along. The throat-plate 20 also has like needle-holes 21, connected by slots 22 with the feed-slot, through which the needle-threads also escape. l

A long hookf is employed and arranged to work transversely to the line of the feed for binding both the needle-threads. It is arranged on the pivot 24 for swinging forward through the needle-thread loops and backward for casting them off and is connected by the rod 25 and pin D with the crank-pin 26, operated by the shaft 27, for so operating it, and the pivot 24 is carried on the end of the rock-shaft 28 for the lateral movements of the hook relatively to the needles, whereby it passes them on one side to engage the needle-loops and after the partial rise of the needles shifts to the other side of the needles for opening the loops to the needles as they descend again, said rock-shaft 28 having a crank-arm 29 on its rear end, which has a stud 30, engaging a cam-groove 31 in a hub of shaft 27, to be operated so as to impart the said lateral movements to the hook. The

shaft 27 is geared by a pair of bevel-wheels y 32 with a vertical shaft 33, located in the vertical part 34 of the hollow stationary arm 35, and geared at its upper end with the main shaft s by a pair of bevel-wheels 36, dotted in Fig. G; but the hook and the means of operating it, also the feed-operatin g lever 37, are common to the machine which I have taken for the application of my improvements and are not claimed herein.

Although the operations of the looper relatively to the two needles for securing the IOO IIO

needle-threads is the same as in other machines, especially the one represented in the patent to L. Muther, January 29, 1886, No. 344,492, the said operations are herein illustrated in Figs. 11 to 17, inclusive, for the better understanding ot' the operations of the interchanging needles in producing the double-zigzag seam of my invention.

With the material 37, in which the seam has -progressed several stitches and supposed to be lying on the work-plate, (not shown), and the two needles descending for the beginning of a new stitch, the material having been fed along preparatory therefor, the looperfwill occupy the position represented in Fig. 11, with the loops 38 of the respective needle-threads on it, the needles will descend on-the rear side of the looper and through the loop 39 of the looper-thread which was passed .through loops 3S of the needle-thread on the forward movement of the looper, as represented in Fig. 12. The looper then withdraws and the needles having completed the downward movement and passed upward to some extent throw out new loops 38 of needle-thread, as represented in Fig. 13, when the looper swings forward again behind the needles and through the needle-loops, as in Fig. 14. The needles then rise out ofthe work,drawing the needle-th reads up on the looper, as shown in Fig. 15, and the material will then be fed along preparatory to the beginning of new stitches, as in Fig. 16, and at the same time the needles exchange places, as hereinbefore described,'for crossing their threads on the upper surface of the material, as also shown in Fig. 16, when the work proceedsvas before for making the next stitch of each row, when the needles reverse again. Fig. 17 represents in perspective view a short chain of the seam separately from the material, showing the loops 38 of the needle-threads secured by loops 39 of the looper-thread. In Figs. 11 to 17, inclusive, the double-zigzag seam is shown on the surface of the material 37 by the two needle-threads crossin g from one row of stitches 40 to the other row 41 diagonally and crossing each other intermediately of said rows at 42 and looped through the material, as shown.

It is to be understood that this improved machine is to be used alike for uniting two or more pieces of goods and for ornamental seams on the surfaces of single pieces.

What I claim as my invention is 1. Inasewing-machine, the combination of needle-operating and feed-operating mechanisms, two needles mounted independently of each other and independently movable laterally relative to each other and located in a line transversely to the feed-line and at a suitable distance apart, and each having its individual thread, means to cause said needles to automatically exchange places with each other while in the operation of sewing without turning the needles, and means for binding the needle-thread loops.

2. In a sewing-machine, the combination of needle-operating and feed-operating mechanisms, two needles mounted independently of each other and independently movable laterally relative to each other and located in a line transversely to the feed-line and at a suitable distance apart and each having its individual thread, means to cause said needles to exchange places with each other alternately with the stitch-forming operations Without turning, and means for binding the needle-thread loops.

3. In a sewing-machine, the combination of needle-operating and feed-operating mechanisms, two needles mounted independently of each other and located in a line transversely to the feed-line and at a suitable distance apart and each having its individual thread, means to cause said needles to exchange places with each other alternately with the stitch-forming operations vwithout turning, and a looping device working in the plane of the needles for binding 0E the loops of both needle-threads.

4. In a sewing-machine, the combination of needle-operating and feed-operating mechanisms, two needles located in a line transversely of the feed-line and at a suitable distance-apart and each having its individual thread, both having automatic translatory movements for exchanging places one with the other while in the operation of sewing, one of which moves in a direct line from one position to the other, and the other moves in a curved -path between said positions to avoid coniiict of the needles one with the other and means for causing such translatory movements.

5. In a sewing-machine, the combination of needle-operating and feed-operating mechanisms, -two needles located in a line transversely to the line of feed, a support for one of said needles having translatory movements carrying it laterally out of one working position and reversely into the other working position, a support for the other needle having translatory movements in a direct line from one working position to the other, and means for simultaneously operating said supports and thereby exchanging the positions of the needles.

Signed at New York city this 19th day of January, 1901.V

HERMANN A. KLEMM.

Witnesses:

J. M. HOWARD, C. SEDGwIoK.

ICO

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